Revert multilib addition. This is not to be done until multilib and empi from the science overlay can coexist. See #541738
(Portage version: 2.2.14/cvs/Linux x86_64, signed Manifest commit with key 4D7043C9)

(#126295) Add Open MPI ebuild from the science overlay (Sebastien Fabbro, Eric Thibodeau). I removed the compiler-based slotting mechanism because portage lacks support for multiple slots of the same version -- the SLOT file in /var/db/pkg just gets overwritten and it loses track of the others, amongst other issues. Removed USE=static, that's used to compile static binaries, not to also build static libraries. Changed SLOT to 0 from 6 in the overlay. Removed the hack for PGI compilers, that needs to happen in fortran.eclass. Use epause() from eutils.eclass rather than sleep.
(Portage version: 2.1.2_pre1-r1)

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